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Fix parsing of option type Kint (integer, stored in K). Bug 2348
[exim.git] / src / src / readconf.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
11
12 #include "exim.h"
13
14 #ifdef MACRO_PREDEF
15 # include "macro_predef.h"
16 #endif
17
18 #define READCONF_DEBUG if (FALSE) /* Change to TRUE to enable */
19
20
21 static uschar * syslog_facility_str;
22 static void fn_smtp_receive_timeout(const uschar *, const uschar *);
23
24 /*************************************************
25 * Main configuration options *
26 *************************************************/
27
28 /* The list of options that can be set in the main configuration file. This
29 must be in alphabetic order because it is searched by binary chop. */
30
31 static optionlist optionlist_config[] = {
32 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
33 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
34 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
35 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
36 { "accept_8bitmime", opt_bool, &accept_8bitmime },
37 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
38 #ifdef WITH_CONTENT_SCAN
39 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
40 #endif
41 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
42 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
43 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
44 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
45 #ifndef DISABLE_PRDR
46 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
47 #endif
48 #ifndef DISABLE_DKIM
49 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
50 #endif
51 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
52 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
53 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
54 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
55 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
56 #ifdef WITH_CONTENT_SCAN
57 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
58 #endif
59 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
60 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
61 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
62 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
63 #ifdef SUPPORT_TLS
64 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
65 #endif
66 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
67 { "add_environment", opt_stringptr, &add_environment },
68 { "admin_groups", opt_gidlist, &admin_groups },
69 { "allow_domain_literals", opt_bool, &allow_domain_literals },
70 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
71 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
72 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
73 { "auto_thaw", opt_time, &auto_thaw },
74 #ifdef WITH_CONTENT_SCAN
75 { "av_scanner", opt_stringptr, &av_scanner },
76 #endif
77 { "bi_command", opt_stringptr, &bi_command },
78 #ifdef EXPERIMENTAL_BRIGHTMAIL
79 { "bmi_config_file", opt_stringptr, &bmi_config_file },
80 #endif
81 { "bounce_message_file", opt_stringptr, &bounce_message_file },
82 { "bounce_message_text", opt_stringptr, &bounce_message_text },
83 { "bounce_return_body", opt_bool, &bounce_return_body },
84 { "bounce_return_linesize_limit", opt_mkint, &bounce_return_linesize_limit },
85 { "bounce_return_message", opt_bool, &bounce_return_message },
86 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
87 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
88 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
89 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
90 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
91 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
92 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
93 { "check_log_inodes", opt_int, &check_log_inodes },
94 { "check_log_space", opt_Kint, &check_log_space },
95 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
96 { "check_spool_inodes", opt_int, &check_spool_inodes },
97 { "check_spool_space", opt_Kint, &check_spool_space },
98 { "chunking_advertise_hosts", opt_stringptr, &chunking_advertise_hosts },
99 { "commandline_checks_require_admin", opt_bool,&commandline_checks_require_admin },
100 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
101 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
102 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
103 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
104 #ifdef EXPERIMENTAL_DCC
105 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
106 { "dccifd_address", opt_stringptr, &dccifd_address },
107 { "dccifd_options", opt_stringptr, &dccifd_options },
108 #endif
109 { "debug_store", opt_bool, &debug_store },
110 { "delay_warning", opt_timelist, &delay_warning },
111 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
112 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
113 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
114 { "delivery_date_remove", opt_bool, &delivery_date_remove },
115 #ifdef ENABLE_DISABLE_FSYNC
116 { "disable_fsync", opt_bool, &disable_fsync },
117 #endif
118 { "disable_ipv6", opt_bool, &disable_ipv6 },
119 #ifndef DISABLE_DKIM
120 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
121 #endif
122 #ifdef EXPERIMENTAL_DMARC
123 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
124 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
125 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
126 #endif
127 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
128 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
129 { "dns_cname_loops", opt_int, &dns_cname_loops },
130 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
131 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
132 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
133 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
134 { "dns_retrans", opt_time, &dns_retrans },
135 { "dns_retry", opt_int, &dns_retry },
136 { "dns_trust_aa", opt_stringptr, &dns_trust_aa },
137 { "dns_use_edns0", opt_int, &dns_use_edns0 },
138 /* This option is now a no-op, retained for compatibility */
139 { "drop_cr", opt_bool, &drop_cr },
140 /*********************************************************/
141 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
142 { "dsn_from", opt_stringptr, &dsn_from },
143 { "envelope_to_remove", opt_bool, &envelope_to_remove },
144 { "errors_copy", opt_stringptr, &errors_copy },
145 { "errors_reply_to", opt_stringptr, &errors_reply_to },
146 #ifndef DISABLE_EVENT
147 { "event_action", opt_stringptr, &event_action },
148 #endif
149 { "exim_group", opt_gid, &exim_gid },
150 { "exim_path", opt_stringptr, &exim_path },
151 { "exim_user", opt_uid, &exim_uid },
152 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
153 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
154 { "finduser_retries", opt_int, &finduser_retries },
155 { "freeze_tell", opt_stringptr, &freeze_tell },
156 { "gecos_name", opt_stringptr, &gecos_name },
157 { "gecos_pattern", opt_stringptr, &gecos_pattern },
158 #ifdef SUPPORT_TLS
159 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
160 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
161 #endif
162 { "header_line_maxsize", opt_int, &header_line_maxsize },
163 { "header_maxsize", opt_int, &header_maxsize },
164 { "headers_charset", opt_stringptr, &headers_charset },
165 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
166 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
167 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
168 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
169 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
170 { "hold_domains", opt_stringptr, &hold_domains },
171 { "host_lookup", opt_stringptr, &host_lookup },
172 { "host_lookup_order", opt_stringptr, &host_lookup_order },
173 { "host_reject_connection", opt_stringptr, &host_reject_connection },
174 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
175 #ifdef SUPPORT_PROXY
176 { "hosts_proxy", opt_stringptr, &hosts_proxy },
177 #endif
178 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
179 #ifdef LOOKUP_IBASE
180 { "ibase_servers", opt_stringptr, &ibase_servers },
181 #endif
182 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
183 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
184 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
185 { "keep_environment", opt_stringptr, &keep_environment },
186 { "keep_malformed", opt_time, &keep_malformed },
187 #ifdef LOOKUP_LDAP
188 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
189 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
190 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
191 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
192 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
193 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
194 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
195 { "ldap_start_tls", opt_bool, &eldap_start_tls },
196 { "ldap_version", opt_int, &eldap_version },
197 #endif
198 { "local_from_check", opt_bool, &local_from_check },
199 { "local_from_prefix", opt_stringptr, &local_from_prefix },
200 { "local_from_suffix", opt_stringptr, &local_from_suffix },
201 { "local_interfaces", opt_stringptr, &local_interfaces },
202 #ifdef HAVE_LOCAL_SCAN
203 { "local_scan_timeout", opt_time, &local_scan_timeout },
204 #endif
205 { "local_sender_retain", opt_bool, &local_sender_retain },
206 { "localhost_number", opt_stringptr, &host_number_string },
207 { "log_file_path", opt_stringptr, &log_file_path },
208 { "log_selector", opt_stringptr, &log_selector_string },
209 { "log_timezone", opt_bool, &log_timezone },
210 { "lookup_open_max", opt_int, &lookup_open_max },
211 { "max_username_length", opt_int, &max_username_length },
212 { "message_body_newlines", opt_bool, &message_body_newlines },
213 { "message_body_visible", opt_mkint, &message_body_visible },
214 { "message_id_header_domain", opt_stringptr, &message_id_domain },
215 { "message_id_header_text", opt_stringptr, &message_id_text },
216 { "message_logs", opt_bool, &message_logs },
217 { "message_size_limit", opt_stringptr, &message_size_limit },
218 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
219 { "move_frozen_messages", opt_bool, &move_frozen_messages },
220 #endif
221 { "mua_wrapper", opt_bool, &mua_wrapper },
222 #ifdef LOOKUP_MYSQL
223 { "mysql_servers", opt_stringptr, &mysql_servers },
224 #endif
225 { "never_users", opt_uidlist, &never_users },
226 #ifdef SUPPORT_TLS
227 { "openssl_options", opt_stringptr, &openssl_options },
228 #endif
229 #ifdef LOOKUP_ORACLE
230 { "oracle_servers", opt_stringptr, &oracle_servers },
231 #endif
232 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
233 #ifdef EXIM_PERL
234 { "perl_at_start", opt_bool, &opt_perl_at_start },
235 { "perl_startup", opt_stringptr, &opt_perl_startup },
236 { "perl_taintmode", opt_bool, &opt_perl_taintmode },
237 #endif
238 #ifdef LOOKUP_PGSQL
239 { "pgsql_servers", opt_stringptr, &pgsql_servers },
240 #endif
241 { "pid_file_path", opt_stringptr, &pid_file_path },
242 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
243 #ifdef EXPERIMENTAL_PIPE_CONNECT
244 { "pipelining_connect_advertise_hosts", opt_stringptr,
245 &pipe_connect_advertise_hosts },
246 #endif
247 #ifndef DISABLE_PRDR
248 { "prdr_enable", opt_bool, &prdr_enable },
249 #endif
250 { "preserve_message_logs", opt_bool, &preserve_message_logs },
251 { "primary_hostname", opt_stringptr, &primary_hostname },
252 { "print_topbitchars", opt_bool, &print_topbitchars },
253 { "process_log_path", opt_stringptr, &process_log_path },
254 { "prod_requires_admin", opt_bool, &prod_requires_admin },
255 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
256 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
257 { "queue_domains", opt_stringptr, &queue_domains },
258 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
259 { "queue_only", opt_bool, &queue_only },
260 { "queue_only_file", opt_stringptr, &queue_only_file },
261 { "queue_only_load", opt_fixed, &queue_only_load },
262 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
263 { "queue_only_override", opt_bool, &queue_only_override },
264 { "queue_run_in_order", opt_bool, &queue_run_in_order },
265 { "queue_run_max", opt_stringptr, &queue_run_max },
266 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
267 { "receive_timeout", opt_time, &receive_timeout },
268 { "received_header_text", opt_stringptr, &received_header_text },
269 { "received_headers_max", opt_int, &received_headers_max },
270 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
271 { "recipients_max", opt_int, &recipients_max },
272 { "recipients_max_reject", opt_bool, &recipients_max_reject },
273 #ifdef LOOKUP_REDIS
274 { "redis_servers", opt_stringptr, &redis_servers },
275 #endif
276 { "remote_max_parallel", opt_int, &remote_max_parallel },
277 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
278 { "retry_data_expire", opt_time, &retry_data_expire },
279 { "retry_interval_max", opt_time, &retry_interval_max },
280 { "return_path_remove", opt_bool, &return_path_remove },
281 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
282 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
283 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
284 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
285 { "slow_lookup_log", opt_int, &slow_lookup_log },
286 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
287 { "smtp_accept_max", opt_int, &smtp_accept_max },
288 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
289 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
290 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
291 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
292 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
293 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
294 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
295 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
296 { "smtp_banner", opt_stringptr, &smtp_banner },
297 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
298 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
299 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
300 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
301 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
302 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
303 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
304 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
305 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
306 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
307 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
308 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
309 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
310 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
311 #ifdef SUPPORT_I18N
312 { "smtputf8_advertise_hosts", opt_stringptr, &smtputf8_advertise_hosts },
313 #endif
314 #ifdef WITH_CONTENT_SCAN
315 { "spamd_address", opt_stringptr, &spamd_address },
316 #endif
317 #ifdef SUPPORT_SPF
318 { "spf_guess", opt_stringptr, &spf_guess },
319 #endif
320 { "split_spool_directory", opt_bool, &split_spool_directory },
321 { "spool_directory", opt_stringptr, &spool_directory },
322 { "spool_wireformat", opt_bool, &spool_wireformat },
323 #ifdef LOOKUP_SQLITE
324 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
325 #endif
326 #ifdef EXPERIMENTAL_SRS
327 { "srs_config", opt_stringptr, &srs_config },
328 { "srs_hashlength", opt_int, &srs_hashlength },
329 { "srs_hashmin", opt_int, &srs_hashmin },
330 { "srs_maxage", opt_int, &srs_maxage },
331 { "srs_secrets", opt_stringptr, &srs_secrets },
332 { "srs_usehash", opt_bool, &srs_usehash },
333 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
334 #endif
335 { "strict_acl_vars", opt_bool, &strict_acl_vars },
336 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
337 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
338 { "syslog_duplication", opt_bool, &syslog_duplication },
339 { "syslog_facility", opt_stringptr, &syslog_facility_str },
340 { "syslog_pid", opt_bool, &syslog_pid },
341 { "syslog_processname", opt_stringptr, &syslog_processname },
342 { "syslog_timestamp", opt_bool, &syslog_timestamp },
343 { "system_filter", opt_stringptr, &system_filter },
344 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
345 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
346 { "system_filter_group", opt_gid, &system_filter_gid },
347 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
348 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
349 { "system_filter_user", opt_uid, &system_filter_uid },
350 { "tcp_nodelay", opt_bool, &tcp_nodelay },
351 #ifdef USE_TCP_WRAPPERS
352 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
353 #endif
354 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
355 { "timezone", opt_stringptr, &timezone_string },
356 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
357 #ifdef SUPPORT_TLS
358 # ifdef EXPERIMENTAL_REQUIRETLS
359 { "tls_advertise_requiretls", opt_stringptr, &tls_advertise_requiretls },
360 # endif
361 { "tls_certificate", opt_stringptr, &tls_certificate },
362 { "tls_crl", opt_stringptr, &tls_crl },
363 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
364 { "tls_dhparam", opt_stringptr, &tls_dhparam },
365 { "tls_eccurve", opt_stringptr, &tls_eccurve },
366 # ifndef DISABLE_OCSP
367 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
368 # endif
369 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
370 { "tls_privatekey", opt_stringptr, &tls_privatekey },
371 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
372 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
373 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
374 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
375 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
376 #endif
377 { "trusted_groups", opt_gidlist, &trusted_groups },
378 { "trusted_users", opt_uidlist, &trusted_users },
379 { "unknown_login", opt_stringptr, &unknown_login },
380 { "unknown_username", opt_stringptr, &unknown_username },
381 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
382 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
383 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
384 { "warn_message_file", opt_stringptr, &warn_message_file },
385 { "write_rejectlog", opt_bool, &write_rejectlog }
386 };
387
388 #ifndef MACRO_PREDEF
389 static int optionlist_config_size = nelem(optionlist_config);
390 #endif
391
392
393 #ifdef MACRO_PREDEF
394
395 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str) {/*Dummy*/}
396
397 void
398 options_main(void)
399 {
400 options_from_list(optionlist_config, nelem(optionlist_config), US"MAIN", NULL);
401 }
402
403 void
404 options_auths(void)
405 {
406 struct auth_info * ai;
407 uschar buf[64];
408
409 options_from_list(optionlist_auths, optionlist_auths_size, US"AUTHENTICATORS", NULL);
410
411 for (ai = auths_available; ai->driver_name[0]; ai++)
412 {
413 spf(buf, sizeof(buf), US"_DRIVER_AUTHENTICATOR_%T", ai->driver_name);
414 builtin_macro_create(buf);
415 options_from_list(ai->options, (unsigned)*ai->options_count, US"AUTHENTICATOR", ai->driver_name);
416 }
417 }
418
419 void
420 options_logging(void)
421 {
422 bit_table * bp;
423 uschar buf[64];
424
425 for (bp = log_options; bp < log_options + log_options_count; bp++)
426 {
427 spf(buf, sizeof(buf), US"_LOG_%T", bp->name);
428 builtin_macro_create(buf);
429 }
430 }
431
432
433 #else /*!MACRO_PREDEF*/
434
435 extern char **environ;
436
437 static void save_config_line(const uschar* line);
438 static void save_config_position(const uschar *file, int line);
439 static void print_config(BOOL admin, BOOL terse);
440
441
442 #define CSTATE_STACK_SIZE 10
443
444 const uschar *config_directory = NULL;
445
446
447 /* Structure for chain (stack) of .included files */
448
449 typedef struct config_file_item {
450 struct config_file_item *next;
451 const uschar *filename;
452 const uschar *directory;
453 FILE *file;
454 int lineno;
455 } config_file_item;
456
457 /* Structure for chain of configuration lines (-bP config) */
458
459 typedef struct config_line_item {
460 struct config_line_item *next;
461 uschar *line;
462 } config_line_item;
463
464 static config_line_item* config_lines;
465
466 /* Structure of table of conditional words and their state transitions */
467
468 typedef struct cond_item {
469 uschar *name;
470 int namelen;
471 int action1;
472 int action2;
473 int pushpop;
474 } cond_item;
475
476 /* Structure of table of syslog facility names and values */
477
478 typedef struct syslog_fac_item {
479 uschar *name;
480 int value;
481 } syslog_fac_item;
482
483 /* constants */
484 static const char * const hidden = "<value not displayable>";
485
486 /* Static variables */
487
488 static config_file_item *config_file_stack = NULL; /* For includes */
489
490 static uschar *syslog_facility_str = NULL;
491 static uschar next_section[24];
492 static uschar time_buffer[24];
493
494 /* State variables for conditional loading (.ifdef / .else / .endif) */
495
496 static int cstate = 0;
497 static int cstate_stack_ptr = -1;
498 static int cstate_stack[CSTATE_STACK_SIZE];
499
500 /* Table of state transitions for handling conditional inclusions. There are
501 four possible state transitions:
502
503 .ifdef true
504 .ifdef false
505 .elifdef true (or .else)
506 .elifdef false
507
508 .endif just causes the previous cstate to be popped off the stack */
509
510 static int next_cstate[3][4] =
511 {
512 /* State 0: reading from file, or reading until next .else or .endif */
513 { 0, 1, 2, 2 },
514 /* State 1: condition failed, skipping until next .else or .endif */
515 { 2, 2, 0, 1 },
516 /* State 2: skipping until .endif */
517 { 2, 2, 2, 2 },
518 };
519
520 /* Table of conditionals and the states to set. For each name, there are four
521 values: the length of the name (to save computing it each time), the state to
522 set if a macro was found in the line, the state to set if a macro was not found
523 in the line, and a stack manipulation setting which is:
524
525 -1 pull state value off the stack
526 0 don't alter the stack
527 +1 push value onto stack, before setting new state
528 */
529
530 static cond_item cond_list[] = {
531 { US"ifdef", 5, 0, 1, 1 },
532 { US"ifndef", 6, 1, 0, 1 },
533 { US"elifdef", 7, 2, 3, 0 },
534 { US"elifndef", 8, 3, 2, 0 },
535 { US"else", 4, 2, 2, 0 },
536 { US"endif", 5, 0, 0, -1 }
537 };
538
539 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
540
541 /* Table of syslog facility names and their values */
542
543 static syslog_fac_item syslog_list[] = {
544 { US"mail", LOG_MAIL },
545 { US"user", LOG_USER },
546 { US"news", LOG_NEWS },
547 { US"uucp", LOG_UUCP },
548 { US"local0", LOG_LOCAL0 },
549 { US"local1", LOG_LOCAL1 },
550 { US"local2", LOG_LOCAL2 },
551 { US"local3", LOG_LOCAL3 },
552 { US"local4", LOG_LOCAL4 },
553 { US"local5", LOG_LOCAL5 },
554 { US"local6", LOG_LOCAL6 },
555 { US"local7", LOG_LOCAL7 },
556 { US"daemon", LOG_DAEMON }
557 };
558
559 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
560
561
562
563
564 /*************************************************
565 * Find the name of an option *
566 *************************************************/
567
568 /* This function is to aid debugging. Various functions take arguments that are
569 pointer variables in the options table or in option tables for various drivers.
570 For debugging output, it is useful to be able to find the name of the option
571 which is currently being processed. This function finds it, if it exists, by
572 searching the table(s).
573
574 Arguments: a value that is presumed to be in the table above
575 Returns: the option name, or an empty string
576 */
577
578 uschar *
579 readconf_find_option(void *p)
580 {
581 int i;
582 router_instance *r;
583 transport_instance *t;
584
585 for (i = 0; i < nelem(optionlist_config); i++)
586 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
587
588 for (r = routers; r; r = r->next)
589 {
590 router_info *ri = r->info;
591 for (i = 0; i < *ri->options_count; i++)
592 {
593 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
594 if (p == CS (r->options_block) + (long int)(ri->options[i].value))
595 return US ri->options[i].name;
596 }
597 }
598
599 for (t = transports; t; t = t->next)
600 {
601 transport_info *ti = t->info;
602 for (i = 0; i < *ti->options_count; i++)
603 {
604 optionlist * op = &ti->options[i];
605 if ((op->type & opt_mask) != opt_stringptr) continue;
606 if (p == ( op->type & opt_public
607 ? CS t
608 : CS t->options_block
609 )
610 + (long int)op->value)
611 return US op->name;
612 }
613 }
614
615 return US"";
616 }
617
618
619
620
621 /*************************************************
622 * Deal with an assignment to a macro *
623 *************************************************/
624
625 /* We have a new definition; append to the list.
626
627 Args:
628 name Name of the macro; will be copied
629 val Expansion result for the macro; will be copied
630 */
631
632 macro_item *
633 macro_create(const uschar * name, const uschar * val, BOOL command_line)
634 {
635 macro_item * m = store_get(sizeof(macro_item));
636
637 READCONF_DEBUG fprintf(stderr, "%s: '%s' '%s'\n", __FUNCTION__, name, val);
638 m->next = NULL;
639 m->command_line = command_line;
640 m->namelen = Ustrlen(name);
641 m->replen = Ustrlen(val);
642 m->name = string_copy(name);
643 m->replacement = string_copy(val);
644 if (mlast)
645 mlast->next = m;
646 else
647 macros = m;
648 mlast = m;
649 if (!macros_user)
650 macros_user = m;
651 return m;
652 }
653
654
655 /* This function is called when a line that starts with an upper case letter is
656 encountered. The argument "line" should contain a complete logical line, and
657 start with the first letter of the macro name. The macro name and the
658 replacement text are extracted and stored. Redefinition of existing,
659 non-command line, macros is permitted using '==' instead of '='.
660
661 Arguments:
662 s points to the start of the logical line
663
664 Returns: FALSE iff fatal error
665 */
666
667 BOOL
668 macro_read_assignment(uschar *s)
669 {
670 uschar name[64];
671 int namelen = 0;
672 BOOL redef = FALSE;
673 macro_item *m;
674
675 while (isalnum(*s) || *s == '_')
676 {
677 if (namelen >= sizeof(name) - 1)
678 {
679 log_write(0, LOG_PANIC|LOG_CONFIG_IN,
680 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
681 return FALSE;
682 }
683 name[namelen++] = *s++;
684 }
685 name[namelen] = 0;
686
687 while (isspace(*s)) s++;
688 if (*s++ != '=')
689 {
690 log_write(0, LOG_PANIC|LOG_CONFIG_IN, "malformed macro definition");
691 return FALSE;
692 }
693
694 if (*s == '=')
695 {
696 redef = TRUE;
697 s++;
698 }
699 while (isspace(*s)) s++;
700
701 /* If an existing macro of the same name was defined on the command line, we
702 just skip this definition. It's an error to attempt to redefine a macro without
703 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
704 It is also an error to define a macro whose name begins with the name of a
705 previously defined macro. This is the requirement that make using a tree
706 for macros hard; we must check all macros for the substring. Perhaps a
707 sorted list, and a bsearch, would work?
708 Note: it is documented that the other way round works. */
709
710 for (m = macros; m; m = m->next)
711 {
712 if (Ustrcmp(m->name, name) == 0)
713 {
714 if (!m->command_line && !redef)
715 {
716 log_write(0, LOG_CONFIG|LOG_PANIC, "macro \"%s\" is already "
717 "defined (use \"==\" if you want to redefine it)", name);
718 return FALSE;
719 }
720 break;
721 }
722
723 if (m->namelen < namelen && Ustrstr(name, m->name) != NULL)
724 {
725 log_write(0, LOG_CONFIG|LOG_PANIC, "\"%s\" cannot be defined as "
726 "a macro because previously defined macro \"%s\" is a substring",
727 name, m->name);
728 return FALSE;
729 }
730
731 /* We cannot have this test, because it is documented that a substring
732 macro is permitted (there is even an example).
733 *
734 * if (m->namelen > namelen && Ustrstr(m->name, name) != NULL)
735 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
736 * "a macro because it is a substring of previously defined macro \"%s\"",
737 * name, m->name);
738 */
739 }
740
741 /* Check for an overriding command-line definition. */
742
743 if (m && m->command_line) return TRUE;
744
745 /* Redefinition must refer to an existing macro. */
746
747 if (redef)
748 if (m)
749 {
750 m->replen = Ustrlen(s);
751 m->replacement = string_copy(s);
752 }
753 else
754 {
755 log_write(0, LOG_CONFIG|LOG_PANIC, "can't redefine an undefined macro "
756 "\"%s\"", name);
757 return FALSE;
758 }
759
760 /* We have a new definition. */
761 else
762 (void) macro_create(name, s, FALSE);
763 return TRUE;
764 }
765
766
767
768
769
770 /* Process line for macros. The line is in big_buffer starting at offset len.
771 Expand big_buffer if needed. Handle definitions of new macros, and
772 macro expansions, rewriting the line in the buffer.
773
774 Arguments:
775 len Offset in buffer of start of line
776 newlen Pointer to offset of end of line, updated on return
777 macro_found Pointer to return that a macro was expanded
778
779 Return: pointer to first nonblank char in line
780 */
781
782 uschar *
783 macros_expand(int len, int * newlen, BOOL * macro_found)
784 {
785 uschar * ss = big_buffer + len;
786 uschar * s;
787 macro_item * m;
788
789 /* Find the true start of the physical line - leading spaces are always
790 ignored. */
791
792 while (isspace(*ss)) ss++;
793
794 /* Process the physical line for macros. If this is the start of the logical
795 line, skip over initial text at the start of the line if it starts with an
796 upper case character followed by a sequence of name characters and an equals
797 sign, because that is the definition of a new macro, and we don't do
798 replacement therein. */
799
800 s = ss;
801 if (len == 0 && isupper(*s))
802 {
803 while (isalnum(*s) || *s == '_') s++;
804 while (isspace(*s)) s++;
805 if (*s != '=') s = ss; /* Not a macro definition */
806 }
807
808 /* Skip leading chars which cannot start a macro name, to avoid multiple
809 pointless rescans in Ustrstr calls. */
810
811 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
812
813 /* For each defined macro, scan the line (from after XXX= if present),
814 replacing all occurrences of the macro. */
815
816 *macro_found = FALSE;
817 if (*s) for (m = *s == '_' ? macros : macros_user; m; m = m->next)
818 {
819 uschar * p, *pp;
820 uschar * t;
821
822 while (*s && !isupper(*s) && !(*s == '_' && isupper(s[1]))) s++;
823 if (!*s) break;
824
825 t = s;
826 while ((p = Ustrstr(t, m->name)) != NULL)
827 {
828 int moveby;
829
830 READCONF_DEBUG fprintf(stderr, "%s: matched '%s' in '%.*s'\n", __FUNCTION__,
831 m->name, (int) Ustrlen(ss)-1, ss);
832 /* Expand the buffer if necessary */
833
834 while (*newlen - m->namelen + m->replen + 1 > big_buffer_size)
835 {
836 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
837 uschar *newbuffer = store_malloc(newsize);
838 memcpy(newbuffer, big_buffer, *newlen + 1);
839 p = newbuffer + (p - big_buffer);
840 s = newbuffer + (s - big_buffer);
841 ss = newbuffer + (ss - big_buffer);
842 t = newbuffer + (t - big_buffer);
843 big_buffer_size = newsize;
844 store_free(big_buffer);
845 big_buffer = newbuffer;
846 }
847
848 /* Shuffle the remaining characters up or down in the buffer before
849 copying in the replacement text. Don't rescan the replacement for this
850 same macro. */
851
852 pp = p + m->namelen;
853 if ((moveby = m->replen - m->namelen) != 0)
854 {
855 memmove(p + m->replen, pp, (big_buffer + *newlen) - pp + 1);
856 *newlen += moveby;
857 }
858 Ustrncpy(p, m->replacement, m->replen);
859 t = p + m->replen;
860 while (*t && !isupper(*t) && !(*t == '_' && isupper(t[1]))) t++;
861 *macro_found = TRUE;
862 }
863 }
864
865 /* An empty macro replacement at the start of a line could mean that ss no
866 longer points to the first non-blank character. */
867
868 while (isspace(*ss)) ss++;
869 return ss;
870 }
871
872 /*************************************************
873 * Read configuration line *
874 *************************************************/
875
876 /* A logical line of text is read from the configuration file into the big
877 buffer, taking account of macros, .includes, and continuations. The size of
878 big_buffer is increased if necessary. The count of configuration lines is
879 maintained. Physical input lines starting with # (ignoring leading white space,
880 and after macro replacement) and empty logical lines are always ignored.
881 Leading and trailing spaces are removed.
882
883 If we hit a line of the form "begin xxxx", the xxxx is placed in the
884 next_section vector, and the function returns NULL, indicating the end of a
885 configuration section. On end-of-file, NULL is returned with next_section
886 empty.
887
888 Arguments: none
889
890 Returns: a pointer to the first non-blank in the line,
891 or NULL if eof or end of section is reached
892 */
893
894 static uschar *
895 get_config_line(void)
896 {
897 int startoffset = 0; /* To first non-blank char in logical line */
898 int len = 0; /* Of logical line so far */
899 int newlen;
900 uschar *s, *ss;
901 BOOL macro_found;
902
903 /* Loop for handling continuation lines, skipping comments, and dealing with
904 .include files. */
905
906 for (;;)
907 {
908 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
909 {
910 if (config_file_stack != NULL) /* EOF inside .include */
911 {
912 (void)fclose(config_file);
913 config_file = config_file_stack->file;
914 config_filename = config_file_stack->filename;
915 config_directory = config_file_stack->directory;
916 config_lineno = config_file_stack->lineno;
917 config_file_stack = config_file_stack->next;
918 if (config_lines)
919 save_config_position(config_filename, config_lineno);
920 continue;
921 }
922
923 /* EOF at top level */
924
925 if (cstate_stack_ptr >= 0)
926 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
927 "Unexpected end of configuration file: .endif missing");
928
929 if (len != 0) break; /* EOF after continuation */
930 next_section[0] = 0; /* EOF at start of logical line */
931 return NULL;
932 }
933
934 config_lineno++;
935 newlen = len + Ustrlen(big_buffer + len);
936
937 if (config_lines && config_lineno == 1)
938 save_config_position(config_filename, config_lineno);
939
940 /* Handle pathologically long physical lines - yes, it did happen - by
941 extending big_buffer at this point. The code also copes with very long
942 logical lines. */
943
944 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
945 {
946 uschar *newbuffer;
947 big_buffer_size += BIG_BUFFER_SIZE;
948 newbuffer = store_malloc(big_buffer_size);
949
950 /* This use of strcpy is OK because we know that the string in the old
951 buffer is shorter than the new buffer. */
952
953 Ustrcpy(newbuffer, big_buffer);
954 store_free(big_buffer);
955 big_buffer = newbuffer;
956 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
957 break;
958 newlen += Ustrlen(big_buffer + newlen);
959 }
960
961 ss = macros_expand(len, &newlen, &macro_found);
962
963 /* Check for comment lines - these are physical lines. */
964
965 if (*ss == '#') continue;
966
967 /* Handle conditionals, which are also applied to physical lines. Conditions
968 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
969 expansion occured on the rest of the line. A preliminary test for the leading
970 '.' saves effort on most lines. */
971
972 if (*ss == '.')
973 {
974 int i;
975
976 /* Search the list of conditional directives */
977
978 for (i = 0; i < cond_list_size; i++)
979 {
980 int n;
981 cond_item *c = cond_list+i;
982 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
983
984 /* The following character must be white space or end of string */
985
986 n = ss[1 + c->namelen];
987 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
988
989 /* .ifdef and .ifndef push the current state onto the stack, then set
990 a new one from the table. Stack overflow is an error */
991
992 if (c->pushpop > 0)
993 {
994 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
995 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
996 ".%s nested too deeply", c->name);
997 cstate_stack[++cstate_stack_ptr] = cstate;
998 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
999 }
1000
1001 /* For any of the others, stack underflow is an error. The next state
1002 comes either from the stack (.endif) or from the table. */
1003
1004 else
1005 {
1006 if (cstate_stack_ptr < 0)
1007 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1008 ".%s without matching .ifdef", c->name);
1009 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
1010 next_cstate[cstate][macro_found? c->action1 : c->action2];
1011 }
1012
1013 /* Having dealt with a directive, break the loop */
1014
1015 break;
1016 }
1017
1018 /* If we have handled a conditional directive, continue with the next
1019 physical line. Otherwise, fall through. */
1020
1021 if (i < cond_list_size) continue;
1022 }
1023
1024 /* If the conditional state is not 0 (actively using these lines), ignore
1025 this input line. */
1026
1027 if (cstate != 0) continue; /* Conditional skip */
1028
1029 /* Handle .include lines - these are also physical lines. */
1030
1031 if (Ustrncmp(ss, ".include", 8) == 0 &&
1032 (isspace(ss[8]) ||
1033 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
1034 {
1035 uschar *t;
1036 int include_if_exists = isspace(ss[8])? 0 : 10;
1037 config_file_item *save;
1038 struct stat statbuf;
1039
1040 ss += 9 + include_if_exists;
1041 while (isspace(*ss)) ss++;
1042 t = ss + Ustrlen(ss);
1043 while (t > ss && isspace(t[-1])) t--;
1044 if (*ss == '\"' && t[-1] == '\"')
1045 {
1046 ss++;
1047 t--;
1048 }
1049 *t = 0;
1050
1051 /* We allow relative file names. For security reasons currently
1052 relative names not allowed with .include_if_exists. For .include_if_exists
1053 we need to check the permissions/ownership of the containing folder */
1054 if (*ss != '/')
1055 if (include_if_exists) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
1056 "absolute path \"%s\"", ss);
1057 else
1058 {
1059 gstring * g = string_append(NULL, 3, config_directory, "/", ss);
1060 ss = string_from_gstring(g);
1061 }
1062
1063 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
1064
1065 if (config_lines)
1066 save_config_position(config_filename, config_lineno);
1067 save = store_get(sizeof(config_file_item));
1068 save->next = config_file_stack;
1069 config_file_stack = save;
1070 save->file = config_file;
1071 save->filename = config_filename;
1072 save->directory = config_directory;
1073 save->lineno = config_lineno;
1074
1075 if (!(config_file = Ufopen(ss, "rb")))
1076 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
1077 "configuration file %s", ss);
1078
1079 config_filename = string_copy(ss);
1080 config_directory = string_copyn(ss, CUstrrchr(ss, '/') - ss);
1081 config_lineno = 0;
1082 continue;
1083 }
1084
1085 /* If this is the start of the logical line, remember where the non-blank
1086 data starts. Otherwise shuffle down continuation lines to remove leading
1087 white space. */
1088
1089 if (len == 0)
1090 startoffset = ss - big_buffer;
1091 else
1092 {
1093 s = big_buffer + len;
1094 if (ss > s)
1095 {
1096 memmove(s, ss, (newlen - len) - (ss - s) + 1);
1097 newlen -= ss - s;
1098 }
1099 }
1100
1101 /* Accept the new addition to the line. Remove trailing white space. */
1102
1103 len = newlen;
1104 while (len > 0 && isspace(big_buffer[len-1])) len--;
1105 big_buffer[len] = 0;
1106
1107 /* We are done if the line does not end in backslash and contains some data.
1108 Empty logical lines are ignored. For continuations, remove the backslash and
1109 go round the loop to read the continuation line. */
1110
1111 if (len > 0)
1112 {
1113 if (big_buffer[len-1] != '\\') break; /* End of logical line */
1114 big_buffer[--len] = 0; /* Remove backslash */
1115 }
1116 } /* Loop for reading multiple physical lines */
1117
1118 /* We now have a logical line. Test for the end of a configuration section (or,
1119 more accurately, for the start of the next section). Place the name of the next
1120 section in next_section, and return NULL. If the name given is longer than
1121 next_section, truncate it. It will be unrecognized later, because all the known
1122 section names do fit. Leave space for pluralizing. */
1123
1124 s = big_buffer + startoffset; /* First non-space character */
1125
1126 if (config_lines)
1127 save_config_line(s);
1128
1129 if (strncmpic(s, US"begin ", 6) == 0)
1130 {
1131 s += 6;
1132 while (isspace(*s)) s++;
1133 if (big_buffer + len - s > sizeof(next_section) - 2)
1134 s[sizeof(next_section) - 2] = 0;
1135 Ustrcpy(next_section, s);
1136 return NULL;
1137 }
1138
1139 /* Return the first non-blank character. */
1140
1141 return s;
1142 }
1143
1144
1145
1146 /*************************************************
1147 * Read a name *
1148 *************************************************/
1149
1150 /* The yield is the pointer to the next uschar. Names longer than the
1151 output space are silently truncated. This function is also used from acl.c when
1152 parsing ACLs.
1153
1154 Arguments:
1155 name where to put the name
1156 len length of name
1157 s input pointer
1158
1159 Returns: new input pointer
1160 */
1161
1162 uschar *
1163 readconf_readname(uschar *name, int len, uschar *s)
1164 {
1165 int p = 0;
1166 while (isspace(*s)) s++;
1167 if (isalpha(*s))
1168 {
1169 while (isalnum(*s) || *s == '_')
1170 {
1171 if (p < len-1) name[p++] = *s;
1172 s++;
1173 }
1174 }
1175 name[p] = 0;
1176 while (isspace(*s)) s++;
1177 return s;
1178 }
1179
1180
1181
1182
1183 /*************************************************
1184 * Read a time value *
1185 *************************************************/
1186
1187 /* This function is also called from outside, to read argument
1188 time values. The format of a time value is:
1189
1190 [<n>w][<n>d][<n>h][<n>m][<n>s]
1191
1192 as long as at least one is present. If a format error is encountered,
1193 return a negative value. The value must be terminated by the given
1194 terminator.
1195
1196 Arguments:
1197 s input pointer
1198 terminator required terminating character
1199 return_msec if TRUE, allow fractional seconds and return milliseconds
1200
1201 Returns: the time value, or -1 on syntax error
1202 value is seconds if return_msec is FALSE
1203 value is milliseconds if return_msec is TRUE
1204 */
1205
1206 int
1207 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1208 {
1209 int yield = 0;
1210 for (;;)
1211 {
1212 int value, count;
1213 double fraction;
1214
1215 if (!isdigit(*s)) return -1;
1216 (void)sscanf(CCS s, "%d%n", &value, &count);
1217 s += count;
1218
1219 switch (*s)
1220 {
1221 case 'w': value *= 7;
1222 case 'd': value *= 24;
1223 case 'h': value *= 60;
1224 case 'm': value *= 60;
1225 case 's': s++;
1226 break;
1227
1228 case '.':
1229 if (!return_msec) return -1;
1230 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1231 s += count;
1232 if (*s++ != 's') return -1;
1233 yield += (int)(fraction * 1000.0);
1234 break;
1235
1236 default: return -1;
1237 }
1238
1239 if (return_msec) value *= 1000;
1240 yield += value;
1241 if (*s == terminator) return yield;
1242 }
1243 /* Control never reaches here. */
1244 }
1245
1246
1247
1248 /*************************************************
1249 * Read a fixed point value *
1250 *************************************************/
1251
1252 /* The value is returned *1000
1253
1254 Arguments:
1255 s input pointer
1256 terminator required terminator
1257
1258 Returns: the value, or -1 on error
1259 */
1260
1261 static int
1262 readconf_readfixed(const uschar *s, int terminator)
1263 {
1264 int yield = 0;
1265 int value, count;
1266 if (!isdigit(*s)) return -1;
1267 (void)sscanf(CS s, "%d%n", &value, &count);
1268 s += count;
1269 yield = value * 1000;
1270 if (*s == '.')
1271 {
1272 int m = 100;
1273 while (isdigit((*(++s))))
1274 {
1275 yield += (*s - '0') * m;
1276 m /= 10;
1277 }
1278 }
1279
1280 return (*s == terminator)? yield : (-1);
1281 }
1282
1283
1284
1285 /*************************************************
1286 * Find option in list *
1287 *************************************************/
1288
1289 /* The lists are always in order, so binary chop can be used.
1290
1291 Arguments:
1292 name the option name to search for
1293 ol the first entry in the option list
1294 last one more than the offset of the last entry in the option list
1295
1296 Returns: pointer to an option entry, or NULL if not found
1297 */
1298
1299 static optionlist *
1300 find_option(uschar *name, optionlist *ol, int last)
1301 {
1302 int first = 0;
1303 while (last > first)
1304 {
1305 int middle = (first + last)/2;
1306 int c = Ustrcmp(name, ol[middle].name);
1307
1308 if (c == 0) return ol + middle;
1309 else if (c > 0) first = middle + 1;
1310 else last = middle;
1311 }
1312 return NULL;
1313 }
1314
1315
1316
1317 /*************************************************
1318 * Find a set flag in option list *
1319 *************************************************/
1320
1321 /* Because some versions of Unix make no restrictions on the values of uids and
1322 gids (even negative ones), we cannot represent "unset" by a special value.
1323 There is therefore a separate boolean variable for each one indicating whether
1324 a value is set or not. This function returns a pointer to the boolean, given
1325 the original option name. It is a major disaster if the flag cannot be found.
1326
1327 Arguments:
1328 name the name of the uid or gid option
1329 oltop points to the start of the relevant option list
1330 last one more than the offset of the last item in the option list
1331 data_block NULL when reading main options => data values in the option
1332 list are absolute addresses; otherwise they are byte offsets
1333 in data_block (used for driver options)
1334
1335 Returns: a pointer to the boolean flag.
1336 */
1337
1338 static BOOL *
1339 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1340 {
1341 optionlist *ol;
1342 uschar name2[64];
1343 sprintf(CS name2, "*set_%.50s", name);
1344 ol = find_option(name2, oltop, last);
1345 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1346 "Exim internal error: missing set flag for %s", name);
1347 return (data_block == NULL)? (BOOL *)(ol->value) :
1348 (BOOL *)(US data_block + (long int)(ol->value));
1349 }
1350
1351
1352
1353
1354 /*************************************************
1355 * Output extra characters message and die *
1356 *************************************************/
1357
1358 /* Called when an option line has junk on the end. Sometimes this is because
1359 the sysadmin thinks comments are permitted.
1360
1361 Arguments:
1362 s points to the extra characters
1363 t1..t3 strings to insert in the log message
1364
1365 Returns: doesn't return; dies
1366 */
1367
1368 static void
1369 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1370 {
1371 uschar *comment = US"";
1372 if (*s == '#') comment = US" (# is comment only at line start)";
1373 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1374 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1375 }
1376
1377
1378
1379 /*************************************************
1380 * Read rewrite information *
1381 *************************************************/
1382
1383 /* Each line of rewrite information contains:
1384
1385 . A complete address in the form user@domain, possibly with
1386 leading * for each part; or alternatively, a regex.
1387
1388 . A replacement string (which will be expanded).
1389
1390 . An optional sequence of one-letter flags, indicating which
1391 headers etc. to apply this rule to.
1392
1393 All this is decoded and placed into a control block. The OR of the flags is
1394 maintained in a common word.
1395
1396 Arguments:
1397 p points to the string that makes up the rule
1398 existflags points to the overall flag word
1399 isglobal TRUE if reading global rewrite rules
1400
1401 Returns: the control block for the parsed rule.
1402 */
1403
1404 static rewrite_rule *
1405 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1406 {
1407 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1408
1409 next->next = NULL;
1410 next->key = string_dequote(&p);
1411
1412 while (isspace(*p)) p++;
1413 if (*p == 0)
1414 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1415 "missing rewrite replacement string");
1416
1417 next->flags = 0;
1418 next->replacement = string_dequote(&p);
1419
1420 while (*p != 0) switch (*p++)
1421 {
1422 case ' ': case '\t': break;
1423
1424 case 'q': next->flags |= rewrite_quit; break;
1425 case 'w': next->flags |= rewrite_whole; break;
1426
1427 case 'h': next->flags |= rewrite_all_headers; break;
1428 case 's': next->flags |= rewrite_sender; break;
1429 case 'f': next->flags |= rewrite_from; break;
1430 case 't': next->flags |= rewrite_to; break;
1431 case 'c': next->flags |= rewrite_cc; break;
1432 case 'b': next->flags |= rewrite_bcc; break;
1433 case 'r': next->flags |= rewrite_replyto; break;
1434
1435 case 'E': next->flags |= rewrite_all_envelope; break;
1436 case 'F': next->flags |= rewrite_envfrom; break;
1437 case 'T': next->flags |= rewrite_envto; break;
1438
1439 case 'Q': next->flags |= rewrite_qualify; break;
1440 case 'R': next->flags |= rewrite_repeat; break;
1441
1442 case 'S':
1443 next->flags |= rewrite_smtp;
1444 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1445 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1446 "rewrite rule has the S flag but is not a regular expression");
1447 break;
1448
1449 default:
1450 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1451 "unknown rewrite flag character '%c' "
1452 "(could be missing quotes round replacement item)", p[-1]);
1453 break;
1454 }
1455
1456 /* If no action flags are set, set all the "normal" rewrites. */
1457
1458 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1459 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1460
1461 /* Remember which exist, for optimization, and return the rule */
1462
1463 *existflags |= next->flags;
1464 return next;
1465 }
1466
1467
1468
1469
1470 /*************************************************
1471 * Read global rewrite information *
1472 *************************************************/
1473
1474 /* Each line is a single rewrite rule; it is parsed into a control block
1475 by readconf_one_rewrite(), and its flags are ORed into the global flag
1476 word rewrite_existflags. */
1477
1478 void
1479 readconf_rewrites(void)
1480 {
1481 rewrite_rule **chain = &global_rewrite_rules;
1482 uschar *p;
1483
1484 while ((p = get_config_line()) != NULL)
1485 {
1486 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1487 *chain = next;
1488 chain = &(next->next);
1489 }
1490 }
1491
1492
1493
1494 /*************************************************
1495 * Read a string *
1496 *************************************************/
1497
1498 /* Strings are read into the normal store pool. As long we aren't too
1499 near the end of the current block, the string will just use what is necessary
1500 on the top of the stacking pool, because string_cat() uses the extension
1501 mechanism.
1502
1503 Argument:
1504 s the rest of the input line
1505 name the option name (for errors)
1506
1507 Returns: pointer to the string
1508 */
1509
1510 static uschar *
1511 read_string(const uschar *s, const uschar *name)
1512 {
1513 uschar *yield;
1514 const uschar *ss;
1515
1516 if (*s != '\"') return string_copy(s);
1517
1518 ss = s;
1519 yield = string_dequote(&s);
1520
1521 if (s == ss+1 || s[-1] != '\"')
1522 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1523 "missing quote at end of string value for %s", name);
1524
1525 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1526
1527 return yield;
1528 }
1529
1530
1531 /*************************************************
1532 * Custom-handler options *
1533 *************************************************/
1534 static void
1535 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1536 {
1537 if (*str == '$')
1538 smtp_receive_timeout_s = string_copy(str);
1539 else
1540 {
1541 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1542 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1543 if (smtp_receive_timeout < 0)
1544 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1545 name);
1546 }
1547 }
1548
1549 /*************************************************
1550 * Handle option line *
1551 *************************************************/
1552
1553 /* This function is called from several places to process a line containing the
1554 setting of an option. The first argument is the line to be decoded; it has been
1555 checked not to be empty and not to start with '#'. Trailing newlines and white
1556 space have been removed. The second argument is a pointer to the list of
1557 variable names that are to be recognized, together with their types and
1558 locations, and the third argument gives the number of entries in the list.
1559
1560 The fourth argument is a pointer to a data block. If it is NULL, then the data
1561 values in the options list are absolute addresses. Otherwise, they are byte
1562 offsets in the data block.
1563
1564 String option data may continue onto several lines; this function reads further
1565 data from config_file if necessary.
1566
1567 The yield of this function is normally zero. If a string continues onto
1568 multiple lines, then the data value is permitted to be followed by a comma
1569 or a semicolon (for use in drivers) and the yield is that character.
1570
1571 Arguments:
1572 buffer contains the configuration line to be handled
1573 oltop points to the start of the relevant option list
1574 last one more than the offset of the last item in the option list
1575 data_block NULL when reading main options => data values in the option
1576 list are absolute addresses; otherwise they are byte offsets
1577 in data_block when they have opt_public set; otherwise
1578 they are byte offsets in data_block->options_block.
1579 unknown_txt format string to use in panic message for unknown option;
1580 must contain %s for option name
1581 if given as NULL, don't panic on unknown option
1582
1583 Returns: TRUE if an option was read successfully,
1584 FALSE false for an unknown option if unknown_txt == NULL,
1585 otherwise panic and die on an unknown option
1586 */
1587
1588 static BOOL
1589 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1590 void *data_block, uschar *unknown_txt)
1591 {
1592 int ptr = 0;
1593 int offset = 0;
1594 int n, count, type, value;
1595 int issecure = 0;
1596 uid_t uid;
1597 gid_t gid;
1598 BOOL boolvalue = TRUE;
1599 BOOL freesptr = TRUE;
1600 optionlist *ol, *ol2;
1601 struct passwd *pw;
1602 void *reset_point;
1603 int intbase = 0;
1604 uschar *inttype = US"";
1605 uschar *sptr;
1606 uschar *s = buffer;
1607 uschar **str_target;
1608 uschar name[64];
1609 uschar name2[64];
1610
1611 /* There may be leading spaces; thereafter, we expect an option name starting
1612 with a letter. */
1613
1614 while (isspace(*s)) s++;
1615 if (!isalpha(*s))
1616 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1617
1618 /* Read the name of the option, and skip any subsequent white space. If
1619 it turns out that what we read was "hide", set the flag indicating that
1620 this is a secure option, and loop to read the next word. */
1621
1622 for (n = 0; n < 2; n++)
1623 {
1624 while (isalnum(*s) || *s == '_')
1625 {
1626 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1627 s++;
1628 }
1629 name[ptr] = 0;
1630 while (isspace(*s)) s++;
1631 if (Ustrcmp(name, "hide") != 0) break;
1632 issecure = opt_secure;
1633 ptr = 0;
1634 }
1635
1636 /* Deal with "no_" or "not_" here for booleans */
1637
1638 if (Ustrncmp(name, "no_", 3) == 0)
1639 {
1640 boolvalue = FALSE;
1641 offset = 3;
1642 }
1643
1644 if (Ustrncmp(name, "not_", 4) == 0)
1645 {
1646 boolvalue = FALSE;
1647 offset = 4;
1648 }
1649
1650 /* Search the list for the given name. A non-existent name, or an option that
1651 is set twice, is a disaster. */
1652
1653 if (!(ol = find_option(name + offset, oltop, last)))
1654 {
1655 if (unknown_txt == NULL) return FALSE;
1656 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1657 }
1658
1659 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1660 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1661 "\"%s\" option set for the second time", name);
1662
1663 ol->type |= opt_set | issecure;
1664 type = ol->type & opt_mask;
1665
1666 /* Types with data values must be followed by '='; the "no[t]_" prefix
1667 applies only to boolean values. */
1668
1669 if (type < opt_bool || type > opt_bool_last)
1670 {
1671 if (offset != 0)
1672 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1673 "negation prefix applied to a non-boolean option");
1674 if (*s == 0)
1675 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1676 "unexpected end of line (data missing) after %s", name);
1677 if (*s != '=')
1678 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1679 }
1680
1681 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1682 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1683 ultimately expands to one of those values. */
1684
1685 else if (*s != 0 && (offset != 0 || *s != '='))
1686 extra_chars_error(s, US"boolean option ", name, US"");
1687
1688 /* Skip white space after = */
1689
1690 if (*s == '=') while (isspace((*(++s))));
1691
1692 /* If there is a data block and the opt_public flag is not set, change
1693 the data block pointer to the private options block. */
1694
1695 if (data_block != NULL && (ol->type & opt_public) == 0)
1696 data_block = (void *)(((driver_instance *)data_block)->options_block);
1697
1698 /* Now get the data according to the type. */
1699
1700 switch (type)
1701 {
1702 /* If a string value is not enclosed in quotes, it consists of
1703 the rest of the current line, verbatim. Otherwise, string escapes
1704 are processed.
1705
1706 A transport is specified as a string, which is then looked up in the
1707 list of transports. A search type is specified as one of a number of
1708 known strings.
1709
1710 A set or rewrite rules for a driver is specified as a string, which is
1711 then parsed into a suitable chain of control blocks.
1712
1713 Uids and gids are specified as strings which are then looked up in the
1714 passwd file. Lists of uids and gids are similarly specified as colon-
1715 separated strings. */
1716
1717 case opt_stringptr:
1718 case opt_uid:
1719 case opt_gid:
1720 case opt_expand_uid:
1721 case opt_expand_gid:
1722 case opt_uidlist:
1723 case opt_gidlist:
1724 case opt_rewrite:
1725
1726 reset_point = sptr = read_string(s, name);
1727
1728 /* Having read a string, we now have several different ways of using it,
1729 depending on the data type, so do another switch. If keeping the actual
1730 string is not required (because it is interpreted), freesptr is set TRUE,
1731 and at the end we reset the pool. */
1732
1733 switch (type)
1734 {
1735 /* If this was a string, set the variable to point to the new string,
1736 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1737 rules, we still keep the string (for printing), and parse the rules into a
1738 control block and flags word. */
1739
1740 case opt_stringptr:
1741 str_target = data_block ? USS (US data_block + (long int)(ol->value))
1742 : USS (ol->value);
1743 if (ol->type & opt_rep_con)
1744 {
1745 uschar * saved_condition;
1746 /* We already have a condition, we're conducting a crude hack to let
1747 multiple condition rules be chained together, despite storing them in
1748 text form. */
1749 *str_target = string_copy_malloc( (saved_condition = *str_target)
1750 ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1751 saved_condition, sptr)
1752 : sptr);
1753 /* TODO(pdp): there is a memory leak here and just below
1754 when we set 3 or more conditions; I still don't
1755 understand the store mechanism enough to know
1756 what's the safe way to free content from an earlier store.
1757 AFAICT, stores stack, so freeing an early stored item also stores
1758 all data alloc'd after it. If we knew conditions were adjacent,
1759 we could survive that, but we don't. So I *think* we need to take
1760 another bit from opt_type to indicate "malloced"; this seems like
1761 quite a hack, especially for this one case. It also means that
1762 we can't ever reclaim the store from the *first* condition.
1763
1764 Because we only do this once, near process start-up, I'm prepared to
1765 let this slide for the time being, even though it rankles. */
1766 }
1767 else if (ol->type & opt_rep_str)
1768 {
1769 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1770 int sep_i = -(int)sep_o;
1771 const uschar * list = sptr;
1772 uschar * s;
1773 gstring * list_o = NULL;
1774
1775 if (*str_target)
1776 {
1777 list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
1778 list_o = string_cat(list_o, *str_target);
1779 }
1780
1781 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1782 list_o = string_append_listele(list_o, sep_o, s);
1783
1784 if (list_o)
1785 *str_target = string_copy_malloc(string_from_gstring(list_o));
1786 }
1787 else
1788 {
1789 *str_target = sptr;
1790 freesptr = FALSE;
1791 }
1792 break;
1793
1794 case opt_rewrite:
1795 if (data_block)
1796 *USS (US data_block + (long int)(ol->value)) = sptr;
1797 else
1798 *USS (ol->value) = sptr;
1799 freesptr = FALSE;
1800 if (type == opt_rewrite)
1801 {
1802 int sep = 0;
1803 int *flagptr;
1804 uschar *p = sptr;
1805 rewrite_rule **chain;
1806 optionlist *ol3;
1807
1808 sprintf(CS name2, "*%.50s_rules", name);
1809 ol2 = find_option(name2, oltop, last);
1810 sprintf(CS name2, "*%.50s_flags", name);
1811 ol3 = find_option(name2, oltop, last);
1812
1813 if (ol2 == NULL || ol3 == NULL)
1814 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1815 "rewrite rules not available for driver");
1816
1817 if (data_block == NULL)
1818 {
1819 chain = (rewrite_rule **)(ol2->value);
1820 flagptr = (int *)(ol3->value);
1821 }
1822 else
1823 {
1824 chain = (rewrite_rule **)(US data_block + (long int)(ol2->value));
1825 flagptr = (int *)(US data_block + (long int)(ol3->value));
1826 }
1827
1828 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1829 {
1830 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1831 *chain = next;
1832 chain = &(next->next);
1833 }
1834
1835 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1836 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1837 "non-header rewrite - not allowed at transport time -");
1838 }
1839 break;
1840
1841 /* If it was an expanded uid, see if there is any expansion to be
1842 done by checking for the presence of a $ character. If there is, save it
1843 in the corresponding *expand_user option field. Otherwise, fall through
1844 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1845 of data. */
1846
1847 case opt_expand_uid:
1848 sprintf(CS name2, "*expand_%.50s", name);
1849 ol2 = find_option(name2, oltop, last);
1850 if (ol2 != NULL)
1851 {
1852 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1853
1854 if (data_block == NULL)
1855 *((uschar **)(ol2->value)) = ss;
1856 else
1857 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1858
1859 if (ss != NULL)
1860 {
1861 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1862 freesptr = FALSE;
1863 break;
1864 }
1865 }
1866
1867 /* Look up a fixed uid, and also make use of the corresponding gid
1868 if a passwd entry is returned and the gid has not been set. */
1869
1870 case opt_uid:
1871 if (!route_finduser(sptr, &pw, &uid))
1872 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1873 if (data_block == NULL)
1874 *((uid_t *)(ol->value)) = uid;
1875 else
1876 *((uid_t *)(US data_block + (long int)(ol->value))) = uid;
1877
1878 /* Set the flag indicating a fixed value is set */
1879
1880 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1881
1882 /* Handle matching gid if we have a passwd entry: done by finding the
1883 same name with terminating "user" changed to "group"; if not found,
1884 ignore. Also ignore if the value is already set. */
1885
1886 if (pw == NULL) break;
1887 Ustrcpy(name+Ustrlen(name)-4, "group");
1888 ol2 = find_option(name, oltop, last);
1889 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1890 (ol2->type & opt_mask) == opt_expand_gid))
1891 {
1892 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1893 if (! *set_flag)
1894 {
1895 if (data_block == NULL)
1896 *((gid_t *)(ol2->value)) = pw->pw_gid;
1897 else
1898 *((gid_t *)(US data_block + (long int)(ol2->value))) = pw->pw_gid;
1899 *set_flag = TRUE;
1900 }
1901 }
1902 break;
1903
1904 /* If it was an expanded gid, see if there is any expansion to be
1905 done by checking for the presence of a $ character. If there is, save it
1906 in the corresponding *expand_user option field. Otherwise, fall through
1907 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1908 of data. */
1909
1910 case opt_expand_gid:
1911 sprintf(CS name2, "*expand_%.50s", name);
1912 ol2 = find_option(name2, oltop, last);
1913 if (ol2 != NULL)
1914 {
1915 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1916
1917 if (data_block == NULL)
1918 *((uschar **)(ol2->value)) = ss;
1919 else
1920 *((uschar **)(US data_block + (long int)(ol2->value))) = ss;
1921
1922 if (ss != NULL)
1923 {
1924 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1925 freesptr = FALSE;
1926 break;
1927 }
1928 }
1929
1930 /* Handle freestanding gid */
1931
1932 case opt_gid:
1933 if (!route_findgroup(sptr, &gid))
1934 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1935 if (data_block == NULL)
1936 *((gid_t *)(ol->value)) = gid;
1937 else
1938 *((gid_t *)(US data_block + (long int)(ol->value))) = gid;
1939 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1940 break;
1941
1942 /* If it was a uid list, look up each individual entry, and build
1943 a vector of uids, with a count in the first element. Put the vector
1944 in malloc store so we can free the string. (We are reading into
1945 permanent store already.) */
1946
1947 case opt_uidlist:
1948 {
1949 int count = 1;
1950 uid_t *list;
1951 int ptr = 0;
1952 const uschar *p;
1953 const uschar *op = expand_string (sptr);
1954
1955 if (op == NULL)
1956 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1957 name, expand_string_message);
1958
1959 p = op;
1960 if (*p != 0) count++;
1961 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1962 list = store_malloc(count*sizeof(uid_t));
1963 list[ptr++] = (uid_t)(count - 1);
1964
1965 if (data_block == NULL)
1966 *((uid_t **)(ol->value)) = list;
1967 else
1968 *((uid_t **)(US data_block + (long int)(ol->value))) = list;
1969
1970 p = op;
1971 while (count-- > 1)
1972 {
1973 int sep = 0;
1974 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1975 if (!route_finduser(big_buffer, NULL, &uid))
1976 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1977 big_buffer);
1978 list[ptr++] = uid;
1979 }
1980 }
1981 break;
1982
1983 /* If it was a gid list, look up each individual entry, and build
1984 a vector of gids, with a count in the first element. Put the vector
1985 in malloc store so we can free the string. (We are reading into permanent
1986 store already.) */
1987
1988 case opt_gidlist:
1989 {
1990 int count = 1;
1991 gid_t *list;
1992 int ptr = 0;
1993 const uschar *p;
1994 const uschar *op = expand_string (sptr);
1995
1996 if (op == NULL)
1997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1998 name, expand_string_message);
1999
2000 p = op;
2001 if (*p != 0) count++;
2002 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
2003 list = store_malloc(count*sizeof(gid_t));
2004 list[ptr++] = (gid_t)(count - 1);
2005
2006 if (data_block == NULL)
2007 *((gid_t **)(ol->value)) = list;
2008 else
2009 *((gid_t **)(US data_block + (long int)(ol->value))) = list;
2010
2011 p = op;
2012 while (count-- > 1)
2013 {
2014 int sep = 0;
2015 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
2016 if (!route_findgroup(big_buffer, &gid))
2017 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
2018 big_buffer);
2019 list[ptr++] = gid;
2020 }
2021 }
2022 break;
2023 }
2024
2025 /* Release store if the value of the string doesn't need to be kept. */
2026
2027 if (freesptr) store_reset(reset_point);
2028 break;
2029
2030 /* Expanded boolean: if no characters follow, or if there are no dollar
2031 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
2032 save the string for later expansion in the alternate place. */
2033
2034 case opt_expand_bool:
2035 if (*s != 0 && Ustrchr(s, '$') != 0)
2036 {
2037 sprintf(CS name2, "*expand_%.50s", name);
2038 ol2 = find_option(name2, oltop, last);
2039 if (ol2 != NULL)
2040 {
2041 reset_point = sptr = read_string(s, name);
2042 if (data_block == NULL)
2043 *((uschar **)(ol2->value)) = sptr;
2044 else
2045 *((uschar **)(US data_block + (long int)(ol2->value))) = sptr;
2046 freesptr = FALSE;
2047 break;
2048 }
2049 }
2050 /* Fall through */
2051
2052 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
2053 look for yes/not/true/false. Some booleans are stored in a single bit in
2054 a single int. There's a special fudge for verify settings; without a suffix
2055 they set both xx_sender and xx_recipient. The table points to the sender
2056 value; search subsequently for the recipient. There's another special case:
2057 opt_bool_set also notes when a boolean has been set. */
2058
2059 case opt_bool:
2060 case opt_bit:
2061 case opt_bool_verify:
2062 case opt_bool_set:
2063 if (*s != 0)
2064 {
2065 s = readconf_readname(name2, 64, s);
2066 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
2067 boolvalue = TRUE;
2068 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
2069 boolvalue = FALSE;
2070 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2071 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
2072 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
2073 US"for boolean option ", name);
2074 }
2075
2076 /* Handle single-bit type. */
2077
2078 if (type == opt_bit)
2079 {
2080 int bit = 1 << ((ol->type >> 16) & 31);
2081 int *ptr = (data_block == NULL)?
2082 (int *)(ol->value) :
2083 (int *)(US data_block + (long int)ol->value);
2084 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
2085 break;
2086 }
2087
2088 /* Handle full BOOL types */
2089
2090 if (data_block == NULL)
2091 *((BOOL *)(ol->value)) = boolvalue;
2092 else
2093 *((BOOL *)(US data_block + (long int)(ol->value))) = boolvalue;
2094
2095 /* Verify fudge */
2096
2097 if (type == opt_bool_verify)
2098 {
2099 sprintf(CS name2, "%.50s_recipient", name + offset);
2100 ol2 = find_option(name2, oltop, last);
2101 if (ol2 != NULL)
2102 {
2103 if (data_block == NULL)
2104 *((BOOL *)(ol2->value)) = boolvalue;
2105 else
2106 *((BOOL *)(US data_block + (long int)(ol2->value))) = boolvalue;
2107 }
2108 }
2109
2110 /* Note that opt_bool_set type is set, if there is somewhere to do so */
2111
2112 else if (type == opt_bool_set)
2113 {
2114 sprintf(CS name2, "*set_%.50s", name + offset);
2115 ol2 = find_option(name2, oltop, last);
2116 if (ol2 != NULL)
2117 {
2118 if (data_block == NULL)
2119 *((BOOL *)(ol2->value)) = TRUE;
2120 else
2121 *((BOOL *)(US data_block + (long int)(ol2->value))) = TRUE;
2122 }
2123 }
2124 break;
2125
2126 /* Octal integer */
2127
2128 case opt_octint:
2129 intbase = 8;
2130 inttype = US"octal ";
2131
2132 /* Integer: a simple(ish) case; allow octal and hex formats, and
2133 suffixes K, M, G, and T. The different types affect output, not input. */
2134
2135 case opt_mkint:
2136 case opt_int:
2137 {
2138 uschar *endptr;
2139 long int lvalue;
2140
2141 errno = 0;
2142 lvalue = strtol(CS s, CSS &endptr, intbase);
2143
2144 if (endptr == s)
2145 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2146 inttype, name);
2147
2148 if (errno != ERANGE && *endptr)
2149 {
2150 uschar * mp = US"TtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2151
2152 if ((mp = Ustrchr(mp, *endptr)))
2153 {
2154 endptr++;
2155 do
2156 {
2157 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024)
2158 {
2159 errno = ERANGE;
2160 break;
2161 }
2162 lvalue *= 1024;
2163 }
2164 while (*(mp += 2));
2165 }
2166 }
2167
2168 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
2169 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2170 "absolute value of integer \"%s\" is too large (overflow)", s);
2171
2172 while (isspace(*endptr)) endptr++;
2173 if (*endptr)
2174 extra_chars_error(endptr, inttype, US"integer value for ", name);
2175
2176 value = (int)lvalue;
2177 }
2178
2179 if (data_block)
2180 *(int *)(US data_block + (long int)ol->value) = value;
2181 else
2182 *(int *)ol->value = value;
2183 break;
2184
2185 /* Integer held in K: again, allow formats and suffixes as above. */
2186
2187 case opt_Kint:
2188 {
2189 uschar *endptr;
2190 errno = 0;
2191 int_eximarith_t lvalue = strtol(CS s, CSS &endptr, intbase);
2192
2193 if (endptr == s)
2194 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2195 inttype, name);
2196
2197 if (errno != ERANGE && *endptr)
2198 {
2199 uschar * mp = US"ZzEePpTtGgMmKk\0"; /* YyZzEePpTtGgMmKk */
2200
2201 if ((mp = Ustrchr(mp, *endptr)))
2202 {
2203 endptr++;
2204 while (*(mp += 2))
2205 {
2206 if (lvalue > EXIM_ARITH_MAX/1024 || lvalue < EXIM_ARITH_MIN/1024)
2207 {
2208 errno = ERANGE;
2209 break;
2210 }
2211 lvalue *= 1024;
2212 }
2213 }
2214 else
2215 lvalue = (lvalue + 512)/1024;
2216 }
2217
2218 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2219 "absolute value of integer \"%s\" is too large (overflow)", s);
2220
2221 while (isspace(*endptr)) endptr++;
2222 if (*endptr != 0)
2223 extra_chars_error(endptr, inttype, US"integer value for ", name);
2224
2225 if (data_block)
2226 *(int_eximarith_t *)(US data_block + (long int)ol->value) = lvalue;
2227 else
2228 *(int_eximarith_t *)ol->value = lvalue;
2229 break;
2230 }
2231
2232 /* Fixed-point number: held to 3 decimal places. */
2233
2234 case opt_fixed:
2235 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2236 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2237 "fixed-point number expected for %s", name);
2238
2239 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2240 "integer \"%s\" is too large (overflow)", s);
2241
2242 value *= 1000;
2243
2244 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2245 "integer \"%s\" is too large (overflow)", s);
2246
2247 /* We get a coverity error here for using count, as it derived
2248 from the tainted buffer pointed to by s, as parsed by sscanf().
2249 By the definition of sscanf we must be accessing between start
2250 and end of s (assuming it is nul-terminated...) so ignore the error. */
2251 /* coverity[tainted_data] */
2252 if (s[count] == '.')
2253 {
2254 int d = 100;
2255 while (isdigit(s[++count]))
2256 {
2257 value += (s[count] - '0') * d;
2258 d /= 10;
2259 }
2260 }
2261
2262 while (isspace(s[count])) count++;
2263
2264 if (s[count] != 0)
2265 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2266
2267 if (data_block == NULL)
2268 *((int *)(ol->value)) = value;
2269 else
2270 *((int *)(US data_block + (long int)(ol->value))) = value;
2271 break;
2272
2273 /* There's a special routine to read time values. */
2274
2275 case opt_time:
2276 value = readconf_readtime(s, 0, FALSE);
2277 if (value < 0)
2278 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2279 name);
2280 if (data_block == NULL)
2281 *((int *)(ol->value)) = value;
2282 else
2283 *((int *)(US data_block + (long int)(ol->value))) = value;
2284 break;
2285
2286 /* A time list is a list of colon-separated times, with the first
2287 element holding the size of the list and the second the number of
2288 entries used. */
2289
2290 case opt_timelist:
2291 {
2292 int count = 0;
2293 int *list = (data_block == NULL)?
2294 (int *)(ol->value) :
2295 (int *)(US data_block + (long int)(ol->value));
2296
2297 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2298 {
2299 int terminator = 0;
2300 uschar *snext = Ustrchr(s, ':');
2301 if (snext != NULL)
2302 {
2303 uschar *ss = snext;
2304 while (ss > s && isspace(ss[-1])) ss--;
2305 terminator = *ss;
2306 }
2307 value = readconf_readtime(s, terminator, FALSE);
2308 if (value < 0)
2309 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2310 name);
2311 if (count > 1 && value <= list[count])
2312 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2313 "time value out of order for %s", name);
2314 list[count+1] = value;
2315 if (snext == NULL) break;
2316 s = snext + 1;
2317 while (isspace(*s)) s++;
2318 }
2319
2320 if (count > list[0] - 2)
2321 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2322 name);
2323 if (count > 0 && list[2] == 0) count = 0;
2324 list[1] = count;
2325 break;
2326 }
2327
2328 case opt_func:
2329 {
2330 void (*fn)() = ol->value;
2331 fn(name, s);
2332 break;
2333 }
2334 }
2335
2336 return TRUE;
2337 }
2338
2339
2340
2341 /*************************************************
2342 * Print a time value *
2343 *************************************************/
2344
2345 /*
2346 Argument: a time value in seconds
2347 Returns: pointer to a fixed buffer containing the time as a string,
2348 in readconf_readtime() format
2349 */
2350
2351 uschar *
2352 readconf_printtime(int t)
2353 {
2354 int s, m, h, d, w;
2355 uschar *p = time_buffer;
2356
2357 if (t < 0)
2358 {
2359 *p++ = '-';
2360 t = -t;
2361 }
2362
2363 s = t % 60;
2364 t /= 60;
2365 m = t % 60;
2366 t /= 60;
2367 h = t % 24;
2368 t /= 24;
2369 d = t % 7;
2370 w = t/7;
2371
2372 if (w > 0) p += sprintf(CS p, "%dw", w);
2373 if (d > 0) p += sprintf(CS p, "%dd", d);
2374 if (h > 0) p += sprintf(CS p, "%dh", h);
2375 if (m > 0) p += sprintf(CS p, "%dm", m);
2376 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2377
2378 return time_buffer;
2379 }
2380
2381
2382
2383 /*************************************************
2384 * Print an individual option value *
2385 *************************************************/
2386
2387 /* This is used by the -bP option, so prints to the standard output.
2388 The entire options list is passed in as an argument, because some options come
2389 in pairs - typically uid/gid settings, which can either be explicit numerical
2390 values, or strings to be expanded later. If the numerical value is unset,
2391 search for "*expand_<name>" to see if there is a string equivalent.
2392
2393 Arguments:
2394 ol option entry, or NULL for an unknown option
2395 name option name
2396 options_block NULL for main configuration options; otherwise points to
2397 a driver block; if the option doesn't have opt_public
2398 set, then options_block->options_block is where the item
2399 resides.
2400 oltop points to the option list in which ol exists
2401 last one more than the offset of the last entry in optop
2402 no_labels do not show "foo = " at the start.
2403
2404 Returns: boolean success
2405 */
2406
2407 static BOOL
2408 print_ol(optionlist *ol, uschar *name, void *options_block,
2409 optionlist *oltop, int last, BOOL no_labels)
2410 {
2411 struct passwd *pw;
2412 struct group *gr;
2413 optionlist *ol2;
2414 void *value;
2415 uid_t *uidlist;
2416 gid_t *gidlist;
2417 uschar *s;
2418 uschar name2[64];
2419
2420 if (!ol)
2421 {
2422 printf("%s is not a known option\n", name);
2423 return FALSE;
2424 }
2425
2426 /* Non-admin callers cannot see options that have been flagged secure by the
2427 "hide" prefix. */
2428
2429 if (!f.admin_user && ol->type & opt_secure)
2430 {
2431 if (no_labels)
2432 printf("%s\n", hidden);
2433 else
2434 printf("%s = %s\n", name, hidden);
2435 return TRUE;
2436 }
2437
2438 /* Else show the value of the option */
2439
2440 value = ol->value;
2441 if (options_block)
2442 {
2443 if (!(ol->type & opt_public))
2444 options_block = (void *)(((driver_instance *)options_block)->options_block);
2445 value = (void *)(US options_block + (long int)value);
2446 }
2447
2448 switch(ol->type & opt_mask)
2449 {
2450 case opt_stringptr:
2451 case opt_rewrite: /* Show the text value */
2452 s = *(USS value);
2453 if (!no_labels) printf("%s = ", name);
2454 printf("%s\n", s ? string_printing2(s, FALSE) : US"");
2455 break;
2456
2457 case opt_int:
2458 if (!no_labels) printf("%s = ", name);
2459 printf("%d\n", *((int *)value));
2460 break;
2461
2462 case opt_mkint:
2463 {
2464 int x = *((int *)value);
2465 if (x != 0 && (x & 1023) == 0)
2466 {
2467 int c = 'K';
2468 x >>= 10;
2469 if ((x & 1023) == 0)
2470 {
2471 c = 'M';
2472 x >>= 10;
2473 }
2474 if (!no_labels) printf("%s = ", name);
2475 printf("%d%c\n", x, c);
2476 }
2477 else
2478 {
2479 if (!no_labels) printf("%s = ", name);
2480 printf("%d\n", x);
2481 }
2482 }
2483 break;
2484
2485 case opt_Kint:
2486 {
2487 int_eximarith_t x = *((int_eximarith_t *)value);
2488 if (!no_labels) printf("%s = ", name);
2489 if (x == 0) printf("0\n");
2490 else if ((x & ((1<<30)-1)) == 0) printf(PR_EXIM_ARITH "T\n", x >> 30);
2491 else if ((x & ((1<<20)-1)) == 0) printf(PR_EXIM_ARITH "G\n", x >> 20);
2492 else if ((x & ((1<<10)-1)) == 0) printf(PR_EXIM_ARITH "M\n", x >> 10);
2493 else printf(PR_EXIM_ARITH "K\n", x);
2494 }
2495 break;
2496
2497 case opt_octint:
2498 if (!no_labels) printf("%s = ", name);
2499 printf("%#o\n", *((int *)value));
2500 break;
2501
2502 /* Can be negative only when "unset", in which case integer */
2503
2504 case opt_fixed:
2505 {
2506 int x = *((int *)value);
2507 int f = x % 1000;
2508 int d = 100;
2509 if (x < 0) printf("%s =\n", name); else
2510 {
2511 if (!no_labels) printf("%s = ", name);
2512 printf("%d.", x/1000);
2513 do
2514 {
2515 printf("%d", f/d);
2516 f %= d;
2517 d /= 10;
2518 }
2519 while (f != 0);
2520 printf("\n");
2521 }
2522 }
2523 break;
2524
2525 /* If the numerical value is unset, try for the string value */
2526
2527 case opt_expand_uid:
2528 if (! *get_set_flag(name, oltop, last, options_block))
2529 {
2530 sprintf(CS name2, "*expand_%.50s", name);
2531 if ((ol2 = find_option(name2, oltop, last)))
2532 {
2533 void *value2 = ol2->value;
2534 if (options_block)
2535 value2 = (void *)(US options_block + (long int)value2);
2536 s = *(USS value2);
2537 if (!no_labels) printf("%s = ", name);
2538 printf("%s\n", s ? string_printing(s) : US"");
2539 break;
2540 }
2541 }
2542
2543 /* Else fall through */
2544
2545 case opt_uid:
2546 if (!no_labels) printf("%s = ", name);
2547 if (! *get_set_flag(name, oltop, last, options_block))
2548 printf("\n");
2549 else
2550 if ((pw = getpwuid(*((uid_t *)value))))
2551 printf("%s\n", pw->pw_name);
2552 else
2553 printf("%ld\n", (long int)(*((uid_t *)value)));
2554 break;
2555
2556 /* If the numerical value is unset, try for the string value */
2557
2558 case opt_expand_gid:
2559 if (! *get_set_flag(name, oltop, last, options_block))
2560 {
2561 sprintf(CS name2, "*expand_%.50s", name);
2562 if ( (ol2 = find_option(name2, oltop, last))
2563 && (ol2->type & opt_mask) == opt_stringptr)
2564 {
2565 void *value2 = ol2->value;
2566 if (options_block)
2567 value2 = (void *)(US options_block + (long int)value2);
2568 s = *(USS value2);
2569 if (!no_labels) printf("%s = ", name);
2570 printf("%s\n", s ? string_printing(s) : US"");
2571 break;
2572 }
2573 }
2574
2575 /* Else fall through */
2576
2577 case opt_gid:
2578 if (!no_labels) printf("%s = ", name);
2579 if (! *get_set_flag(name, oltop, last, options_block))
2580 printf("\n");
2581 else
2582 if ((gr = getgrgid(*((int *)value))))
2583 printf("%s\n", gr->gr_name);
2584 else
2585 printf("%ld\n", (long int)(*((int *)value)));
2586 break;
2587
2588 case opt_uidlist:
2589 uidlist = *((uid_t **)value);
2590 if (!no_labels) printf("%s =", name);
2591 if (uidlist)
2592 {
2593 int i;
2594 uschar sep = no_labels ? '\0' : ' ';
2595 for (i = 1; i <= (int)(uidlist[0]); i++)
2596 {
2597 uschar *name = NULL;
2598 if ((pw = getpwuid(uidlist[i]))) name = US pw->pw_name;
2599 if (sep != '\0') printf("%c", sep);
2600 if (name) printf("%s", name);
2601 else printf("%ld", (long int)(uidlist[i]));
2602 sep = ':';
2603 }
2604 }
2605 printf("\n");
2606 break;
2607
2608 case opt_gidlist:
2609 gidlist = *((gid_t **)value);
2610 if (!no_labels) printf("%s =", name);
2611 if (gidlist)
2612 {
2613 int i;
2614 uschar sep = no_labels ? '\0' : ' ';
2615 for (i = 1; i <= (int)(gidlist[0]); i++)
2616 {
2617 uschar *name = NULL;
2618 if ((gr = getgrgid(gidlist[i]))) name = US gr->gr_name;
2619 if (sep != '\0') printf("%c", sep);
2620 if (name) printf("%s", name);
2621 else printf("%ld", (long int)(gidlist[i]));
2622 sep = ':';
2623 }
2624 }
2625 printf("\n");
2626 break;
2627
2628 case opt_time:
2629 if (!no_labels) printf("%s = ", name);
2630 printf("%s\n", readconf_printtime(*((int *)value)));
2631 break;
2632
2633 case opt_timelist:
2634 {
2635 int i;
2636 int *list = (int *)value;
2637 if (!no_labels) printf("%s = ", name);
2638 for (i = 0; i < list[1]; i++)
2639 printf("%s%s", i == 0 ? "" : ":", readconf_printtime(list[i+2]));
2640 printf("\n");
2641 }
2642 break;
2643
2644 case opt_bit:
2645 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2646 "" : "no_", name);
2647 break;
2648
2649 case opt_expand_bool:
2650 sprintf(CS name2, "*expand_%.50s", name);
2651 if ((ol2 = find_option(name2, oltop, last)) && ol2->value)
2652 {
2653 void *value2 = ol2->value;
2654 if (options_block)
2655 value2 = (void *)(US options_block + (long int)value2);
2656 s = *(USS value2);
2657 if (s)
2658 {
2659 if (!no_labels) printf("%s = ", name);
2660 printf("%s\n", string_printing(s));
2661 break;
2662 }
2663 /* s == NULL => string not set; fall through */
2664 }
2665
2666 /* Fall through */
2667
2668 case opt_bool:
2669 case opt_bool_verify:
2670 case opt_bool_set:
2671 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2672 break;
2673 }
2674 return TRUE;
2675 }
2676
2677
2678
2679 /*************************************************
2680 * Print value from main configuration *
2681 *************************************************/
2682
2683 /* This function, called as a result of encountering the -bP option,
2684 causes the value of any main configuration variable to be output if the
2685 second argument is NULL. There are some special values:
2686
2687 all print all main configuration options
2688 config_file print the name of the configuration file
2689 (configure_file will still work, for backward
2690 compatibility)
2691 routers print the routers' configurations
2692 transports print the transports' configuration
2693 authenticators print the authenticators' configuration
2694 macros print the macros' configuration
2695 router_list print a list of router names
2696 transport_list print a list of transport names
2697 authenticator_list print a list of authentication mechanism names
2698 macro_list print a list of macro names
2699 +name print a named list item
2700 local_scan print the local_scan options
2701 config print the configuration as it is parsed
2702 environment print the used execution environment
2703
2704 If the second argument is not NULL, it must be one of "router", "transport",
2705 "authenticator" or "macro" in which case the first argument identifies the
2706 driver whose options are to be printed.
2707
2708 Arguments:
2709 name option name if type == NULL; else driver name
2710 type NULL or driver type name, as described above
2711 no_labels avoid the "foo = " at the start of an item
2712
2713 Returns: Boolean success
2714 */
2715
2716 BOOL
2717 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2718 {
2719 BOOL names_only = FALSE;
2720 optionlist *ol;
2721 optionlist *ol2 = NULL;
2722 driver_instance *d = NULL;
2723 macro_item *m;
2724 int size = 0;
2725
2726 if (!type)
2727 {
2728 if (*name == '+')
2729 {
2730 int i;
2731 tree_node *t;
2732 BOOL found = FALSE;
2733 static uschar *types[] = { US"address", US"domain", US"host",
2734 US"localpart" };
2735 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2736 &hostlist_anchor, &localpartlist_anchor };
2737
2738 for (i = 0; i < 4; i++)
2739 if ((t = tree_search(*(anchors[i]), name+1)))
2740 {
2741 found = TRUE;
2742 if (no_labels)
2743 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2744 else
2745 printf("%slist %s = %s\n", types[i], name+1,
2746 ((namedlist_block *)(t->data.ptr))->string);
2747 }
2748
2749 if (!found)
2750 printf("no address, domain, host, or local part list called \"%s\" "
2751 "exists\n", name+1);
2752
2753 return found;
2754 }
2755
2756 if ( Ustrcmp(name, "configure_file") == 0
2757 || Ustrcmp(name, "config_file") == 0)
2758 {
2759 printf("%s\n", CS config_main_filename);
2760 return TRUE;
2761 }
2762
2763 if (Ustrcmp(name, "all") == 0)
2764 {
2765 for (ol = optionlist_config;
2766 ol < optionlist_config + nelem(optionlist_config); ol++)
2767 if (!(ol->type & opt_hidden))
2768 (void) print_ol(ol, US ol->name, NULL,
2769 optionlist_config, nelem(optionlist_config),
2770 no_labels);
2771 return TRUE;
2772 }
2773
2774 if (Ustrcmp(name, "local_scan") == 0)
2775 {
2776 #ifndef LOCAL_SCAN_HAS_OPTIONS
2777 printf("local_scan() options are not supported\n");
2778 return FALSE;
2779 #else
2780 for (ol = local_scan_options;
2781 ol < local_scan_options + local_scan_options_count; ol++)
2782 (void) print_ol(ol, US ol->name, NULL, local_scan_options,
2783 local_scan_options_count, no_labels);
2784 return TRUE;
2785 #endif
2786 }
2787
2788 if (Ustrcmp(name, "config") == 0)
2789 {
2790 print_config(f.admin_user, no_labels);
2791 return TRUE;
2792 }
2793
2794 if (Ustrcmp(name, "routers") == 0)
2795 {
2796 type = US"router";
2797 name = NULL;
2798 }
2799 else if (Ustrcmp(name, "transports") == 0)
2800 {
2801 type = US"transport";
2802 name = NULL;
2803 }
2804 else if (Ustrcmp(name, "authenticators") == 0)
2805 {
2806 type = US"authenticator";
2807 name = NULL;
2808 }
2809 else if (Ustrcmp(name, "macros") == 0)
2810 {
2811 type = US"macro";
2812 name = NULL;
2813 }
2814 else if (Ustrcmp(name, "router_list") == 0)
2815 {
2816 type = US"router";
2817 name = NULL;
2818 names_only = TRUE;
2819 }
2820 else if (Ustrcmp(name, "transport_list") == 0)
2821 {
2822 type = US"transport";
2823 name = NULL;
2824 names_only = TRUE;
2825 }
2826 else if (Ustrcmp(name, "authenticator_list") == 0)
2827 {
2828 type = US"authenticator";
2829 name = NULL;
2830 names_only = TRUE;
2831 }
2832 else if (Ustrcmp(name, "macro_list") == 0)
2833 {
2834 type = US"macro";
2835 name = NULL;
2836 names_only = TRUE;
2837 }
2838 else if (Ustrcmp(name, "environment") == 0)
2839 {
2840 if (environ)
2841 {
2842 uschar ** p;
2843 for (p = USS environ; *p; p++) ;
2844 qsort(environ, p - USS environ, sizeof(*p), string_compare_by_pointer);
2845
2846 for (p = USS environ; *p; p++)
2847 {
2848 uschar * q;
2849 if (no_labels && (q = Ustrchr(*p, '='))) *q = '\0';
2850 puts(CS *p);
2851 }
2852 }
2853 return TRUE;
2854 }
2855
2856 else
2857 return print_ol(find_option(name,
2858 optionlist_config, nelem(optionlist_config)),
2859 name, NULL, optionlist_config, nelem(optionlist_config), no_labels);
2860 }
2861
2862 /* Handle the options for a router or transport. Skip options that are flagged
2863 as hidden. Some of these are options with names starting with '*', used for
2864 internal alternative representations of other options (which the printing
2865 function will sort out). Others are synonyms kept for backward compatibility.
2866 */
2867
2868 if (Ustrcmp(type, "router") == 0)
2869 {
2870 d = (driver_instance *)routers;
2871 ol2 = optionlist_routers;
2872 size = optionlist_routers_size;
2873 }
2874 else if (Ustrcmp(type, "transport") == 0)
2875 {
2876 d = (driver_instance *)transports;
2877 ol2 = optionlist_transports;
2878 size = optionlist_transports_size;
2879 }
2880 else if (Ustrcmp(type, "authenticator") == 0)
2881 {
2882 d = (driver_instance *)auths;
2883 ol2 = optionlist_auths;
2884 size = optionlist_auths_size;
2885 }
2886
2887 else if (Ustrcmp(type, "macro") == 0)
2888 {
2889 /* People store passwords in macros and they were previously not available
2890 for printing. So we have an admin_users restriction. */
2891 if (!f.admin_user)
2892 {
2893 fprintf(stderr, "exim: permission denied\n");
2894 return FALSE;
2895 }
2896 for (m = macros; m; m = m->next)
2897 if (!name || Ustrcmp(name, m->name) == 0)
2898 {
2899 if (names_only)
2900 printf("%s\n", CS m->name);
2901 else if (no_labels)
2902 printf("%s\n", CS m->replacement);
2903 else
2904 printf("%s=%s\n", CS m->name, CS m->replacement);
2905 if (name)
2906 return TRUE;
2907 }
2908 if (!name) return TRUE;
2909
2910 printf("%s %s not found\n", type, name);
2911 return FALSE;
2912 }
2913
2914 if (names_only)
2915 {
2916 for (; d; d = d->next) printf("%s\n", CS d->name);
2917 return TRUE;
2918 }
2919
2920 /* Either search for a given driver, or print all of them */
2921
2922 for (; d; d = d->next)
2923 {
2924 BOOL rc = FALSE;
2925 if (!name)
2926 printf("\n%s %s:\n", d->name, type);
2927 else if (Ustrcmp(d->name, name) != 0) continue;
2928
2929 for (ol = ol2; ol < ol2 + size; ol++)
2930 if (!(ol->type & opt_hidden))
2931 rc |= print_ol(ol, US ol->name, d, ol2, size, no_labels);
2932
2933 for (ol = d->info->options;
2934 ol < d->info->options + *(d->info->options_count); ol++)
2935 if (!(ol->type & opt_hidden))
2936 rc |= print_ol(ol, US ol->name, d, d->info->options,
2937 *d->info->options_count, no_labels);
2938
2939 if (name) return rc;
2940 }
2941 if (!name) return TRUE;
2942
2943 printf("%s %s not found\n", type, name);
2944 return FALSE;
2945 }
2946
2947
2948
2949 /*************************************************
2950 * Read a named list item *
2951 *************************************************/
2952
2953 /* This function reads a name and a list (i.e. string). The name is used to
2954 save the list in a tree, sorted by its name. Each entry also has a number,
2955 which can be used for caching tests, but if the string contains any expansion
2956 items other than $key, the number is set negative to inhibit caching. This
2957 mechanism is used for domain, host, and address lists that are referenced by
2958 the "+name" syntax.
2959
2960 Arguments:
2961 anchorp points to the tree anchor
2962 numberp points to the current number for this tree
2963 max the maximum number permitted
2964 s the text of the option line, starting immediately after the name
2965 of the list type
2966 tname the name of the list type, for messages
2967
2968 Returns: nothing
2969 */
2970
2971 static void
2972 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2973 uschar *tname)
2974 {
2975 BOOL forcecache = FALSE;
2976 uschar *ss;
2977 tree_node *t;
2978 namedlist_block *nb = store_get(sizeof(namedlist_block));
2979
2980 if (Ustrncmp(s, "_cache", 6) == 0)
2981 {
2982 forcecache = TRUE;
2983 s += 6;
2984 }
2985
2986 if (!isspace(*s))
2987 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2988
2989 if (*numberp >= max)
2990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2991 tname, max);
2992
2993 while (isspace(*s)) s++;
2994 ss = s;
2995 while (isalnum(*s) || *s == '_') s++;
2996 t = store_get(sizeof(tree_node) + s-ss);
2997 Ustrncpy(t->name, ss, s-ss);
2998 t->name[s-ss] = 0;
2999 while (isspace(*s)) s++;
3000
3001 if (!tree_insertnode(anchorp, t))
3002 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3003 "duplicate name \"%s\" for a named %s", t->name, tname);
3004
3005 t->data.ptr = nb;
3006 nb->number = *numberp;
3007 *numberp += 1;
3008
3009 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3010 "missing '=' after \"%s\"", t->name);
3011 while (isspace(*s)) s++;
3012 nb->string = read_string(s, t->name);
3013 nb->cache_data = NULL;
3014
3015 /* Check the string for any expansions; if any are found, mark this list
3016 uncacheable unless the user has explicited forced caching. */
3017
3018 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
3019 }
3020
3021
3022
3023
3024 /*************************************************
3025 * Unpick data for a rate limit *
3026 *************************************************/
3027
3028 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
3029 separate values.
3030
3031 Arguments:
3032 s string, in the form t,b,f,l
3033 where t is the threshold (integer)
3034 b is the initial delay (time)
3035 f is the multiplicative factor (fixed point)
3036 k is the maximum time (time)
3037 threshold where to store threshold
3038 base where to store base in milliseconds
3039 factor where to store factor in milliseconds
3040 limit where to store limit
3041
3042 Returns: nothing (panics on error)
3043 */
3044
3045 static void
3046 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
3047 int *limit)
3048 {
3049 uschar bstring[16], lstring[16];
3050
3051 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
3052 factor, lstring) == 4)
3053 {
3054 *base = readconf_readtime(bstring, 0, TRUE);
3055 *limit = readconf_readtime(lstring, 0, TRUE);
3056 if (*base >= 0 && *limit >= 0) return;
3057 }
3058 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
3059 }
3060
3061
3062
3063
3064 /*************************************************
3065 * Drop privs for checking TLS config *
3066 *************************************************/
3067
3068 /* We want to validate TLS options during readconf, but do not want to be
3069 root when we call into the TLS library, in case of library linkage errors
3070 which cause segfaults; before this check, those were always done as the Exim
3071 runtime user and it makes sense to continue with that.
3072
3073 Assumes: tls_require_ciphers has been set, if it will be
3074 exim_user has been set, if it will be
3075 exim_group has been set, if it will be
3076
3077 Returns: bool for "okay"; false will cause caller to immediately exit.
3078 */
3079
3080 #ifdef SUPPORT_TLS
3081 static BOOL
3082 tls_dropprivs_validate_require_cipher(BOOL nowarn)
3083 {
3084 const uschar *errmsg;
3085 pid_t pid;
3086 int rc, status;
3087 void (*oldsignal)(int);
3088
3089 /* If TLS will never be used, no point checking ciphers */
3090
3091 if ( !tls_advertise_hosts
3092 || !*tls_advertise_hosts
3093 || Ustrcmp(tls_advertise_hosts, ":") == 0
3094 )
3095 return TRUE;
3096 else if (!nowarn && !tls_certificate)
3097 log_write(0, LOG_MAIN,
3098 "Warning: No server certificate defined; will use a selfsigned one.\n"
3099 " Suggested action: either install a certificate or change tls_advertise_hosts option");
3100
3101 oldsignal = signal(SIGCHLD, SIG_DFL);
3102
3103 fflush(NULL);
3104 if ((pid = fork()) < 0)
3105 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
3106
3107 if (pid == 0)
3108 {
3109 /* in some modes, will have dropped privilege already */
3110 if (!geteuid())
3111 exim_setugid(exim_uid, exim_gid, FALSE,
3112 US"calling tls_validate_require_cipher");
3113
3114 if ((errmsg = tls_validate_require_cipher()))
3115 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3116 "tls_require_ciphers invalid: %s", errmsg);
3117 fflush(NULL);
3118 _exit(0);
3119 }
3120
3121 do {
3122 rc = waitpid(pid, &status, 0);
3123 } while (rc < 0 && errno == EINTR);
3124
3125 DEBUG(D_tls)
3126 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
3127 (int)pid, status);
3128
3129 signal(SIGCHLD, oldsignal);
3130
3131 return status == 0;
3132 }
3133 #endif /* SUPPORT_TLS */
3134
3135
3136
3137
3138 /*************************************************
3139 * Read main configuration options *
3140 *************************************************/
3141
3142 /* This function is the first to be called for configuration reading. It
3143 opens the configuration file and reads general configuration settings until
3144 it reaches the end of the configuration section. The file is then left open so
3145 that the remaining configuration data can subsequently be read if needed for
3146 this run of Exim.
3147
3148 The configuration file must be owned either by root or exim, and be writeable
3149 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
3150 in the config file, so the test is done on the compiled in values. A slight
3151 anomaly, to be carefully documented.
3152
3153 The name of the configuration file is taken from a list that is included in the
3154 binary of Exim. It can be altered from the command line, but if that is done,
3155 root privilege is immediately withdrawn unless the caller is root or exim.
3156 The first file on the list that exists is used.
3157
3158 For use on multiple systems that share file systems, first look for a
3159 configuration file whose name has the current node name on the end. If that is
3160 not found, try the generic name. For really contorted configurations, that run
3161 multiple Exims with different uid settings, first try adding the effective uid
3162 before the node name. These complications are going to waste resources on most
3163 systems. Therefore they are available only when requested by compile-time
3164 options. */
3165
3166 void
3167 readconf_main(BOOL nowarn)
3168 {
3169 int sep = 0;
3170 struct stat statbuf;
3171 uschar *s, *filename;
3172 const uschar *list = config_main_filelist;
3173
3174 /* Loop through the possible file names */
3175
3176 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
3177 {
3178
3179 /* Cut out all the fancy processing unless specifically wanted */
3180
3181 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
3182 uschar *suffix = filename + Ustrlen(filename);
3183
3184 /* Try for the node-specific file if a node name exists */
3185
3186 #ifdef CONFIGURE_FILE_USE_NODE
3187 struct utsname uts;
3188 if (uname(&uts) >= 0)
3189 {
3190 #ifdef CONFIGURE_FILE_USE_EUID
3191 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
3192 config_file = Ufopen(filename, "rb");
3193 if (config_file == NULL)
3194 #endif /* CONFIGURE_FILE_USE_EUID */
3195 {
3196 sprintf(CS suffix, ".%.256s", uts.nodename);
3197 config_file = Ufopen(filename, "rb");
3198 }
3199 }
3200 #endif /* CONFIGURE_FILE_USE_NODE */
3201
3202 /* Otherwise, try the generic name, possibly with the euid added */
3203
3204 #ifdef CONFIGURE_FILE_USE_EUID
3205 if (config_file == NULL)
3206 {
3207 sprintf(CS suffix, ".%ld", (long int)original_euid);
3208 config_file = Ufopen(filename, "rb");
3209 }
3210 #endif /* CONFIGURE_FILE_USE_EUID */
3211
3212 /* Finally, try the unadorned name */
3213
3214 if (config_file == NULL)
3215 {
3216 *suffix = 0;
3217 config_file = Ufopen(filename, "rb");
3218 }
3219 #else /* if neither defined */
3220
3221 /* This is the common case when the fancy processing is not included. */
3222
3223 config_file = Ufopen(filename, "rb");
3224 #endif
3225
3226 /* If the file does not exist, continue to try any others. For any other
3227 error, break out (and die). */
3228
3229 if (config_file != NULL || errno != ENOENT) break;
3230 }
3231
3232 /* On success, save the name for verification; config_filename is used when
3233 logging configuration errors (it changes for .included files) whereas
3234 config_main_filename is the name shown by -bP. Failure to open a configuration
3235 file is a serious disaster. */
3236
3237 if (config_file)
3238 {
3239 uschar *last_slash = Ustrrchr(filename, '/');
3240 config_filename = config_main_filename = string_copy(filename);
3241
3242 /* The config_main_directory we need for the $config_dir expansion.
3243 config_main_filename we need for $config_file expansion.
3244 And config_dir is the directory of the current configuration, used for
3245 relative .includes. We do need to know it's name, as we change our working
3246 directory later. */
3247
3248 if (filename[0] == '/')
3249 config_main_directory = last_slash == filename ? US"/" : string_copyn(filename, last_slash - filename);
3250 else
3251 {
3252 /* relative configuration file name: working dir + / + basename(filename) */
3253
3254 uschar buf[PATH_MAX];
3255 gstring * g;
3256
3257 if (os_getcwd(buf, PATH_MAX) == NULL)
3258 {
3259 perror("exim: getcwd");
3260 exit(EXIT_FAILURE);
3261 }
3262 g = string_cat(NULL, buf);
3263
3264 /* If the dir does not end with a "/", append one */
3265 if (g->s[g->ptr-1] != '/')
3266 g = string_catn(g, US"/", 1);
3267
3268 /* If the config file contains a "/", extract the directory part */
3269 if (last_slash)
3270 g = string_catn(g, filename, last_slash - filename);
3271
3272 config_main_directory = string_from_gstring(g);
3273 }
3274 config_directory = config_main_directory;
3275 }
3276 else
3277 {
3278 if (filename == NULL)
3279 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3280 "%s", config_mai